Intangible Assets

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets include transportation agreements and customer relationships that represent a portion of the total purchase price of certain assets acquired from Delek in 2005, from HFC in 2008 prior to HEP becoming a consolidated VIE of HFC, from Plains in 2017, and from other minor acquisitions in 2018.

The carrying amounts of our intangible assets are as follows:

	Useful Life	June 30, 2020		December 31, 2019
		(In thousands)
Delek transportation agreement	30 years	$	59,933	$	59,933
HFC transportation agreement	10-15 years	75,131		75,131
Customer relationships	10 years	69,683		69,683
Other		50		50
		204,797		204,797
Less accumulated amortization		110,479		103,475
		$	94,318	$	101,322

Amortization expense was $7.0 million for both of the six months ended June 30, 2020 and 2019. We estimate amortization expense to be $14.0 million for each of the next two years, $9.9 million in 2023, and $9.1 million in 2024 and 2025.

We have additional transportation agreements with HFC resulting from historical transactions consisting of pipeline, terminal and tankage assets contributed to us or acquired from HFC. These transactions occurred while we were a consolidated variable interest entity of HFC; therefore, our basis in these agreements is zero and does not reflect a step-up in basis to fair value.